The search giant last month quietly added a new, free service called the Safe Browsing Diagnostic Page that tells whether a site flagged by Google as potentially dangerous is hosting malware, or helps distribute malware, for instance. The idea is to give owners of the compromised Websites more information to assist in their remediation and cleanup of the site, and to provide users more information on why the site has been flagged. The search giant’s automatic flagging of potentially risky Websites has been “highly accurate,” according to Niels Provos, senior staff engineer for Google, but it wasn’t easy for Webmasters and users to verify the results.